Index: python/plugins/fTools/tools/doVisual.py
===================================================================
--- python/plugins/fTools/tools/doVisual.py	(revision 13010)
+++ python/plugins/fTools/tools/doVisual.py	(working copy)
@@ -18,7 +18,7 @@
     self.progressBar.setValue( 0 )
     self.partProgressBar.setValue( 0 )
     self.partProgressBar.setEnabled( False )
-    
+
   def keyPressEvent( self, e ):
     '''
     Reimplemented key press event:
@@ -53,15 +53,17 @@
       # add all fields in combobox because now we can work with text fields too
       for i in changedField:
         self.cmbField.addItem( unicode( changedField[i].name() ) )
-        
+
   def accept( self ):
     if self.inShape.currentText() == "":
       QMessageBox.information( self, self.tr("Error!"), self.tr( "Please specify input vector layer" ) )
     elif self.cmbField.isVisible() and self.cmbField.currentText() == "":
       QMessageBox.information( self, self.tr("Error!"), self.tr( "Please specify input field" ) )
+    elif self.useSelected.isChecked() and len( ftools_utils.getVectorLayerByName( self.inShape.currentText() ).selectedFeatures() ) == 0:
+      QMessageBox.warning( self, self.tr("Geoprocessing"), self.tr( "No features selected, please uncheck 'Use selected' or make a selection" ) )
     else:
       self.visual( self.inShape.currentText(), self.cmbField.currentText(), self.useSelected.checkState() )
-  
+
   def manageGui( self ):
     if self.myFunction == 1: # Check geometry validity
       self.setWindowTitle( self.tr( "Check geometry validity" ) )
@@ -96,7 +98,7 @@
     elif self.myFunction == 4:
       myList = ftools_utils.getLayerNames( [ QGis.Point ] )
     else:
-      myList = ftools_utils.getLayerNames( [ QGis.Point, QGis.Line, QGis.Polygon ] )    
+      myList = ftools_utils.getLayerNames( [ QGis.Point, QGis.Line, QGis.Polygon ] )
     self.inShape.addItems( myList )
     return
 
@@ -122,10 +124,10 @@
 
   def cancelThread( self ):
     self.testThread.stop()
-    
+
   def runFinishedFromThread( self, output ):
     self.testThread.stop()
-    
+
     result = output[ 0 ]
     numRows = len( result )
     self.tblUnique.setRowCount( numRows )
@@ -147,15 +149,15 @@
 	self.tblUnique.horizontalHeader().show()
     self.tblUnique.horizontalHeader().setResizeMode( 0, QHeaderView.Stretch )
     self.tblUnique.resizeRowsToContents()
-    
+
     self.lstCount.insert( unicode( output[ 1 ] ) )
     self.cancel_close.setText( "Close" )
     QObject.disconnect( self.cancel_close, SIGNAL( "clicked()" ), self.cancelThread )
     return True
-    
+
   def runStatusFromThread( self, status ):
     self.progressBar.setValue( status )
-        
+
   def runRangeFromThread( self, range_vals ):
     self.progressBar.setRange( range_vals[ 0 ], range_vals[ 1 ] )
 
@@ -163,12 +165,12 @@
     self.partProgressBar.setValue( status )
     if status >= self.part_max:
       self.partProgressBar.setEnabled( False )
-        
+
   def runPartRangeFromThread( self, range_vals ):
     self.part_max = range_vals[ 1 ]
     self.partProgressBar.setEnabled( True )
     self.partProgressBar.setRange( range_vals[ 0 ], range_vals[ 1 ] )
-    
+
 class visualThread( QThread ):
   def __init__( self, parentThread, parentObject, function, vlayer, myField, mySelection ):
     QThread.__init__( self, parentThread )
@@ -195,7 +197,7 @@
     self.emit( SIGNAL( "runStatus(PyQt_PyObject)" ), 0 )
 
   def stop(self):
-    self.running = False        
+    self.running = False
 
   def list_unique_values( self, vlayer, myField ):
     vprovider = vlayer.dataProvider()
@@ -297,7 +299,7 @@
       if self.mySelection: # only selected features
         selection = vlayer.selectedFeatures()
         nFeat = vlayer.selectedFeatureCount()
-	uniqueVal = ftools_utils.getUniqueValuesCount( vlayer, index, True )
+        uniqueVal = ftools_utils.getUniqueValuesCount( vlayer, index, True )
         self.emit( SIGNAL( "runStatus(PyQt_PyObject)" ), 0 )
         self.emit( SIGNAL( "runRange(PyQt_PyObject)" ), ( 0, nFeat ) )
         for f in selection:
@@ -316,7 +318,7 @@
           self.emit( SIGNAL( "runStatus(PyQt_PyObject)" ), nElement )
       else: # there is no selection, process the whole layer
         nFeat = vprovider.featureCount()
-	uniqueVal = ftools_utils.getUniqueValuesCount( vlayer, index, False )
+        uniqueVal = ftools_utils.getUniqueValuesCount( vlayer, index, False )
         self.emit( SIGNAL( "runStatus(PyQt_PyObject)" ), 0 )
         self.emit( SIGNAL( "runRange(PyQt_PyObject)" ), ( 0, nFeat ) )
         while vprovider.nextFeature( feat ):
@@ -430,7 +432,7 @@
           if not self.isCorrectOrientation( polygon ):
             lstErrors.append( self.tr( "Feature %1 has incorrect node ordering" ).arg( unicode( feat.id() ) ) )
             count += 1
-          
+
       else:
         geom = geom.asPolygon()
         if not self.isHoleNested( geom ):